Bootstrap 4 - 将下拉菜单的父级保持为可点击的链接
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【中文标题】Bootstrap 4 - 将下拉菜单的父级保持为可点击的链接【英文标题】：Bootstrap 4 - Keeping Parent of Dropdown a clickable link 【发布时间】：2018-07-26 23:41:08 【问题描述】：<nav class="navbar navbar-expand-lg navbar-light bg-light">
<a class="navbar-brand" href="#">Navbar</a>
<button class="navbar-toggler" type="button" data-toggle="collapse" data-target="#navbarSupportedContent" aria-controls="navbarSupportedContent" aria-expanded="false" aria-label="Toggle navigation">
<span class="navbar-toggler-icon"></span>
</button>
<div class="collapse navbar-collapse" id="navbarSupportedContent">
<ul class="navbar-nav mr-auto">
<li class="nav-item active">
<a class="nav-link" href="#">Home <span class="sr-only">(current)</span></a>
</li>
<li class="nav-item">
<a class="nav-link" href="#">Link</a>
</li>
<li class="nav-item dropdown">
<a class="nav-link dropdown-toggle" href="#" id="navbarDropdown" role="button" data-toggle="dropdown" aria-haspopup="true" aria-expanded="false">
Dropdown
</a>
<div class="dropdown-menu" aria-labelledby="navbarDropdown">
<a class="dropdown-item" href="#">Action</a>
<a class="dropdown-item" href="#">Another action</a>
<div class="dropdown-divider"></div>
<a class="dropdown-item" href="#">Something else here</a>
</div>
</li>
<li class="nav-item">
<a class="nav-link disabled" href="#">Disabled</a>
</li>
</ul>
<form class="form-inline my-2 my-lg-0">
<input class="form-control mr-sm-2" type="search" placeholder="Search" aria-label="Search">
<button class="btn btn-outline-success my-2 my-sm-0" type="submit">Search</button>
</form>
</div>
</nav>
新手引导。这是基于 Bootstrap 示例的代码。现在下拉列表显示，但您无法单击下拉列表本身。我希望能够使所有父导航链接正常工作。类似本站：https://eastcfashion.com/
点击例如：男士系列将您带到该区域的所有系列。但是下拉菜单，你可以只选择特定的项目。
我正在尝试以主要父导航会说项目的方式来实现它。项目的下拉菜单将显示每个项目的特定页面，如项目 1、项目 2 等。但单击项目将带您进入项目 1、项目 2 和项目集合显示为一个组的页面而不是单独的。
【问题讨论】：
我认为您希望下拉菜单出现在悬停...对..？ 【参考方案1】：jQuery(function($)
if ($(window).width() > 769)
$('.navbar .dropdown').hover(function()
$(this).find('.dropdown-menu').first().stop(true, true).delay(250).slideDown();
, function()
$(this).find('.dropdown-menu').first().stop(true, true).delay(100).slideUp();
);
$('.navbar .dropdown > a').click(function()
location.href = this.href;
);
);@media only screen and (min-width:769px)
.dropdown:hover .dropdown-menu
display: block;
.dropdown-submenu
position: relative !important;
.dropdown-submenu>.dropdown-menu
top: 0 !important;
left: 100% !important;
margin-top: -6px !important;
margin-left: -1px !important;
border-radius: 0 !important;
.dropdown-submenu:hover>.dropdown-menu
display: block !important;
.dropdown-submenu>a:after
display: block;
content: "\f105";
font-family: 'FontAwesome';
margin-top: -18px;
right: 15px;
position: absolute;
font-weight: 300;
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<script src="https://v4-alpha.getbootstrap.com/dist/js/bootstrap.min.js"></script>
<link href="https://v4-alpha.getbootstrap.com/dist/css/bootstrap.min.css" rel="stylesheet" />
<nav class="navbar navbar-toggleable-md navbar-light bg-faded">
<button class="navbar-toggler navbar-toggler-right" type="button" data-toggle="collapse" data-target="#navbarSupportedContent" aria-controls="navbarSupportedContent" aria-expanded="false" aria-label="Toggle navigation">
<span class="navbar-toggler-icon"></span>
</button>
<a class="navbar-brand" href="#">Navbar</a>
<div class="collapse navbar-collapse" id="navbarSupportedContent">
<ul class="navbar-nav mr-auto">
<li class="nav-item active">
<a class="nav-link" href="#">Home <span class="sr-only">(current)</span></a>
</li>
<li class="nav-item">
<a class="nav-link" href="#">Link</a>
</li><li class="nav-item dropdown">
<a class="nav-link dropdown-toggle" href="http://example.com" id="navbarDropdownMenuLink" data-toggle="dropdown" aria-haspopup="true" aria-expanded="false">
Dropdown link
</a>
<div class="dropdown-menu" aria-labelledby="navbarDropdownMenuLink">
<a class="dropdown-item" href="#">Action</a>
<a class="dropdown-item" href="#">Another action</a>
<a class="dropdown-item" href="#">Something else here</a>
</div>
</li>
</ul>
<form class="form-inline my-2 my-lg-0">
<input class="form-control mr-sm-2" type="text" placeholder="Search">
<button class="btn btn-outline-success my-2 my-sm-0" type="submit">Search</button>
</form>
</div>
</nav>【讨论】：
您的下拉菜单无法正常工作...当我从下拉链接中下拉时，下拉菜单消失了 我已在本地服务器上尝试过此代码。请将此代码复制到您的文件中。它工作正常。实际上他希望父菜单可链接。 当你打开 js fiddle JS 脚本在刷新后没有加载它工作正常。因此，请在您的文件中更新此代码。可以看到jsfiddle.net/htmlguruz/odz25mL7再次打开刷新页面。谢谢【参考方案2】：<a class="nav-link dropdown-toggle" href="#" id="navbarDropdown" role="button" data-toggle="dropdown" aria-haspopup="true" aria-expanded="false">Dropdown</a>
这个 sn-p 切换下拉菜单，但在点击事件和 href 用于切换下拉菜单。所以根据你的需要-
将href重定向到通用项目页面并添加悬停事件以使用jquery或CSS显示下拉菜单。要显示下拉菜单只需将open class添加到<li class="nav-item dropdown">
Using CSS, Using Jquery
【讨论】：
【参考方案3】：我尽量保持代码简单。我的解决方案是检测对下拉按钮/链接的第二次点击，然后点击该链接。
$('.navbar .dropdown > a').click(function()
if (!$(this).hasClass("parent-clicked"))
$(this).addClass("parent-clicked");
else
location.href = this.href;
);
这也适用于折叠视图。
【讨论】：
如果有人想在第一次点击上工作，只需删除 if 语句。我的意思是只留下location.href = this.href;【参考方案4】：
我接受了乔的回答并根据我的需要对其进行了改进
/*
* Only go to the link when dropdown is already open (if the dropdown is a link)
*/
$('.navbar ul.navbar-nav > .dropdown > a[href]').click(function()
var dropdown = $(this).next('.dropdown-menu');
/*
* The dropdown can be non-existent
* The dropdown can be already open by css
* (for instance display: block from a custom :hover setting)
* or a "show" class on the element which also sets a display: block;
*/
if (dropdown.length == 0 || $(dropdown).css('display') !== 'none')
if (this.href)
location.href = this.href;
);
Bootstrap 4 html 是
<header class="navbar">
<ul class="nav navbar-nav">
<li class="nav-item dropdown">
<a class="nav-link" href="/planning" data-toggle="dropdown">
Planning
</a>
<ul class="dropdown-menu">
<li class="dropdown-item">
<a href="/day-planning">Day planning</a>
</li>
</ul>
</li>
</ul>
</header>
【讨论】：
【参考方案5】：最简单的方法是从父元素中删除“data-toggle”属性！ 编辑：谢谢提示，这是一个代码示例： 我改变了这个：
<a class="p-2 text-dark dropdown-toggle" data-toggle="dropdown" style="font-size:1.25rem;" href= % url 'link' %>Link</a>
到这里：
<a class="p-2 text-dark dropdown-toggle" style="font-size:1.25rem;" href= % url 'link' %>Link</a>
因此，本质上，我只是删除了数据切换属性，从而将可悬停下拉列表转换为带有可点击父链接的可悬停下拉列表。
【讨论】：
确保写上如何做的代码，所以 answer = result =)【参考方案6】：这是我的解决方案。这个想法是检测用户点击下拉按钮/链接的area 并重定向到该网址。
// clickable dropdown menu parent
$('.navbar .dropdown > a').on('click', function(e)
let elementBegin = $(this).offset()['left']; // get link position X
// get the width of the menu by text's length
// you need to contain the text inside a span tag
let spanWidth = $(this).find("> span").width();
let clickAreaLength = spanWidth * 0.9; // 90% of width = clickable area
let clickPositionX = e.pageX; // position of the click
// if click position is inside the clickable area, then redirect
if (clickPositionX < elementBegin + clickAreaLength)
location.href = this.href;
);
这也适用于折叠视图（移动）。
【讨论】：
【参考方案7】：Bootstrap 4 中的可点击下拉链接
我把原来的下拉三角图标隐藏起来，新建一个加号图标，因为原来的图标很小，而且是用伪类:after做的，用户很难点到光标点击。
因此，父 href 链接将正常工作，但当用户单击加号图标时，它将打开下拉菜单。
/* -----------------------------------------------------------------------
Make Bootstrap dropdown "a" link clickable
But when clicking plus icon, show the dropdown
--------------------------------------------------------------------------- */
function clickableDropdownLink()
if (window.matchMedia("(max-width: 992px)").matches)
const dropdownToggle = $('.navbar .dropdown > a');
dropdownToggle.append('<span class="dropdown-icon"></span>');
dropdownToggle.removeAttr('data-toggle');
$('.navbar .dropdown > a').click(function(e)
e.preventDefault();
if ((e.target.tagName == 'A'))
const route = $(this).attr("href");
window.location.href = route == '/' || route == '#' ? window.location.href : route;
return;
)
const dropdownIcon = $('.navbar .dropdown > a > span.dropdown-icon');
dropdownIcon.click(function()
const parentLink = $(this).parent("a.nav-link");
parentLink.parent(".nav-item").toggleClass("show");
parentLink.next(".dropdown-menu").toggle();
)
clickableDropdownLink();
/* ------------------------------------------------------------------------------------
This is optional, this could make your app slower
If you want to make a dropdown link clickable after user resizing screen, you can add this. This could make your app slower
----------------------------------------------------------------------------------------- */
$(window).resize(function()
clickableDropdownLink();
)
/* ------------------------------------------------------------------------------------
This is optional
If you also want the dropdown link work in Desktop size.
----------------------------------------------------------------------------------------- */
if (window.matchMedia("(min-width: 992px)").matches)
$('.navbar .dropdown > a').click(function()
location.href = this.href;
);
.dropdown .dropdown-icon
display: none;
position: absolute;
padding: 15px;
background: #fff;
right: 10px;
top: 8px;
.dropdown .dropdown-icon:before
transition: all ease 0.5s;
background: #444;
height: 2px;
width: 16px;
top: 14px;
left: 7px;
content: "";
position: absolute;
.dropdown .dropdown-icon:after
transition: all ease 0.5s;
background: #444;
content: "";
height: 16px;
left: 14px;
position: absolute;
top: 7px;
width: 2px;
.dropdown.show .dropdown-icon:after
transform:rotate(-90deg);
.dropdown.show .dropdown-icon:before
transform:rotate(-180deg);
.navbar .dropdown .dropdown-toggle .dropdown-icon
display:none;
@media(max-width:992px)
.navbar .dropdown .dropdown-toggle::after
display:none;
.navbar .dropdown .dropdown-toggle .dropdown-icon
display:block;
.navbar .dropdown .dropdown-menu .dropdown-item
white-space:pre-wrap;
<!DOCTYPE html>
<html lang="en" >
<head>
<meta charset="UTF-8">
<title>Clickable Dropdown Link</title>
<link rel='stylesheet' href='https://cdnjs.cloudflare.com/ajax/libs/twitter-bootstrap/4.5.0/css/bootstrap.min.css'><link rel="stylesheet" href="./style.css">
</head>
<body>
<!-- partial:index.partial.html -->
<nav class="navbar navbar-expand-lg navbar-light bg-light">
<a class="navbar-brand" href="#">Navbar</a>
<button class="navbar-toggler" type="button" data-toggle="collapse" data-target="#navbarSupportedContent" aria-controls="navbarSupportedContent" aria-expanded="false" aria-label="Toggle navigation">
<span class="navbar-toggler-icon"></span>
</button>
<div class="collapse navbar-collapse" id="navbarSupportedContent">
<ul class="navbar-nav mr-auto">
<li class="nav-item active">
<a class="nav-link" href="#">Home <span class="sr-only">(current)</span></a>
</li>
<li class="nav-item dropdown">
<a class="nav-link dropdown-toggle" href="https://www.google.com" id="navbarDropdown" role="button" data-toggle="dropdown" aria-haspopup="true" aria-expanded="false">
Dropdown1
</a>
<div class="dropdown-menu" aria-labelledby="navbarDropdown">
<a class="dropdown-item" href="#">Action 1</a>
<a class="dropdown-item" href="#">Another action 1</a>
<div class="dropdown-divider"></div>
<a class="dropdown-item" href="#">Something else here 1</a>
</div>
</li>
<li class="nav-item">
<a class="nav-link" href="#">Link</a>
</li>
<li class="nav-item dropdown">
<a class="nav-link dropdown-toggle" href="https://www.google.com" id="navbarDropdown" role="button" data-toggle="dropdown" aria-haspopup="true" aria-expanded="false">
Dropdown
</a>
<div class="dropdown-menu" aria-labelledby="navbarDropdown">
<a class="dropdown-item" href="#">Action</a>
<a class="dropdown-item" href="#">Another action</a>
<div class="dropdown-divider"></div>
<a class="dropdown-item" href="#">Something else here</a>
</div>
</li>
<li class="nav-item">
<a class="nav-link disabled" href="#">Disabled</a>
</li>
</ul>
<form class="form-inline my-2 my-lg-0">
<input class="form-control mr-sm-2" type="search" placeholder="Search" aria-label="Search">
<button class="btn btn-outline-success my-2 my-sm-0" type="submit">Search</button>
</form>
</div>
</nav>
<!-- partial -->
<script src='https://cdnjs.cloudflare.com/ajax/libs/jquery/3.6.0/jquery.min.js'></script>
<script src='https://cdnjs.cloudflare.com/ajax/libs/popper.js/2.9.1/umd/popper.min.js'></script>
<script src='https://cdnjs.cloudflare.com/ajax/libs/twitter-bootstrap/4.5.0/js/bootstrap.min.js'></script><script src="./script.js"></script>
</body>
</html>【讨论】：
【参考方案8】：//Fix bootstrap dropdown parent click
let clicked = 0;
document.querySelector('.dropdown-toggle').addEventListener('click',(e)=>
clicked++;
if(clicked > 1 && e.target.classList.contains('show'))
location.href = e.target.href
clicked = 0;
)
简单的仅javascript解决方案，如果下拉菜单包含开放类，第二次点击父级将重定向到位置。
【讨论】：
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